Can't remove "Everyone Else" assignment from Mastery Path

We keep running into an issue with our Mastery Paths when we try to edit an assignment that lives in the Mastery Path.

When we remove the "Everyone" assignment and assign only to "Mastery Path" and click save, it ends up assigning to "Mastery Path" and "Everyone Else".

See the video below to see in it action:

What is happening here? We have tried completely blowing away the Mastery Path and recreating it and have basically tried everything short of resetting the course. Any help or suggestions would be appreciated.

We finally just figured this out after a couple weeks and a lot of troubleshooting. We had to go into Student View and Reset View. Once the student view was reset we were able to save our Mastery Path assignments to just Mastery Path. Very weird problem.

We finally just figured this out after a couple weeks and a lot of troubleshooting. We had to go into Student View and Reset View. Once the student view was reset we were able to save our Mastery Path assignments to just Mastery Path. Very weird problem.